Yes. You can input your dietary preferences and we will not recommend foods to you that you cannot, or are not willing to, consume.
You can also easily update these. Food preference or dietary changes (or any profile changes, for that matter) can be made by going to your Profile page. This lives in the drop-down menu that appears when you hover over your name in the top-right of the site’s toolbar. Once on your profile page, select "Account" and then click on the "Nutrition" tab. Make sure you save any changes!